تقرير
Pervasive beyond room-temperature ferromagnetism in a doped van der Waals magnet: Ni doped Fe$_5$GeTe$_2$ with $T_{\text{C}}$ up to 478 K
| العنوان: | Pervasive beyond room-temperature ferromagnetism in a doped van der Waals magnet: Ni doped Fe$_5$GeTe$_2$ with $T_{\text{C}}$ up to 478 K |
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| المؤلفون: | Chen, Xiang, Shao, Yu-Tsun, Chen, Rui, Susarla, Sandhya, Hogan, Tom, He, Yu, Zhang, Hongrui, Wang, Siqi, Yao, Jie, Ercius, Peter, Muller, David A., Ramesh, Ramamoorthy, Birgeneau, Robert J. |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The existence of long range magnetic order in low dimensional magnetic systems, such as the quasi-two-dimensional (2D) van der Waals (vdW) magnets, has attracted intensive studies of new physical phenomena. The vdW Fe$_N$GeTe$_2$ ($N$ = 3, 4, 5; FGT) family is exceptional owing to its vast tunability of magnetic properties. Particularly, a ferromagnetic ordering temperature ($T_{\text{C}}$) above room temperature at $N$ = 5 (F5GT) is observed. Here, our study shows that, by nickel (Ni) substitution of iron (Fe) in F5GT, a record high $T_{\text{C}}$ = 478(6) K is achieved. Importantly, pervasive, beyond-room-temperature ferromagnetism exists in almost the entire doping range of the phase diagram of Ni-F5GT. We argue that this striking observation in Ni-F5GT can be possibly due to several contributing factors, in which the structural alteration enhanced 3D magnetic couplings might be critical for enhancing the ferromagnetic order. Comment: Submitted on 06-Dec-2021; Now online |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.128.217203 |
| URL الوصول: | http://arxiv.org/abs/2203.00125 |
| رقم الأكسشن: | edsarx.2203.00125 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.128.217203 |
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